unregister_sys_off_handler
unregister_sys_off_handler(pi->sys_off);
unregister_sys_off_handler(pi->sys_off);
unregister_sys_off_handler(lenovo_yoga_tab2_830_1050_sys_off_handler);
void unregister_sys_off_handler(struct sys_off_handler *handler);
EXPORT_SYMBOL_GPL(unregister_sys_off_handler);
unregister_sys_off_handler(handler);
unregister_sys_off_handler(platform_power_off_handler);
unregister_sys_off_handler(sys_off);